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EP1041293A3 - Pneumatic cylinder with damping device - Google Patents

Pneumatic cylinder with damping device Download PDF

Info

Publication number
EP1041293A3
EP1041293A3 EP00106560A EP00106560A EP1041293A3 EP 1041293 A3 EP1041293 A3 EP 1041293A3 EP 00106560 A EP00106560 A EP 00106560A EP 00106560 A EP00106560 A EP 00106560A EP 1041293 A3 EP1041293 A3 EP 1041293A3
Authority
EP
European Patent Office
Prior art keywords
piston
damping device
closing member
pneumatic cylinder
helical spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00106560A
Other languages
German (de)
French (fr)
Other versions
EP1041293A2 (en
Inventor
Luciano Migliori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Migliori Luciano
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1041293A2 publication Critical patent/EP1041293A2/en
Publication of EP1041293A3 publication Critical patent/EP1041293A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/223—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which completely seals the main fluid outlet as the piston approaches its end position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/222—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having a piston with a piston extension or piston recess which throttles the main fluid outlet as the piston approaches its end position

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Abstract

A pneumatic cylinder (10, 35) provided with a damping device to decelerate the piston (12) inside a piston chamber (11) at an end of its working stroke, while reducing the impact forces. The damping device comprises a restriceted flow path (21A, 21B) for the fluid and a closing member (22) for an inlet-outlet port (18) which is supported by a helical spring (23) extending from one end of the piston (12); an open cavity (26, 26') at the front end of the piston (12) is designed to receive the closing member (22) and/or the helical spring (23) during damping at the end of the working stroke. Axially extending guide means (14, 14A) for the closing member (22) are provided inside the piston chamber (11).
EP00106560A 1999-03-29 2000-03-27 Pneumatic cylinder with damping device Withdrawn EP1041293A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MI000640A IT1312235B1 (en) 1999-03-29 1999-03-29 SHOCK ABSORBER DEVICE FOR PNEUMATIC CYLINDERS.
ITMI990640 1999-03-29

Publications (2)

Publication Number Publication Date
EP1041293A2 EP1041293A2 (en) 2000-10-04
EP1041293A3 true EP1041293A3 (en) 2003-06-04

Family

ID=11382486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106560A Withdrawn EP1041293A3 (en) 1999-03-29 2000-03-27 Pneumatic cylinder with damping device

Country Status (4)

Country Link
US (1) US6382074B1 (en)
EP (1) EP1041293A3 (en)
CA (1) CA2302722C (en)
IT (1) IT1312235B1 (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1319005B1 (en) * 2000-10-16 2003-09-19 Luciano Migliori COMPACT PNEUMATIC CYLINDER WITH CUSHIONING DEVICE
DE20021520U1 (en) 2000-12-20 2001-03-01 IMI Norgren GmbH, 46519 Alpen Media-operated cylinder
DE10158123B4 (en) * 2001-11-27 2008-06-05 Rexroth Mecman Gmbh Endlagengedämpfter pressure cylinder
DE10246766B3 (en) * 2002-10-07 2004-07-01 Bosch Rexroth Ag Pneumatic cylinder damped in the end position
DE20219451U1 (en) * 2002-12-13 2003-04-24 TRW Fahrwerksysteme GmbH & Co KG, 40547 Düsseldorf hydraulic cylinders
KR101035016B1 (en) * 2009-05-12 2011-05-17 주식회사 한국가스스프링 A gas-spring with a speed controller
CN102108989B (en) * 2010-07-23 2011-12-28 三一重工股份有限公司 Hydrocylinder and related devices thereof, hydraulic buffer system, excavating machine and concrete pump truck
CN102155460B (en) * 2010-07-23 2012-07-04 三一重工股份有限公司 Hydraulic oil cylinder and related devices of hydraulic oil cylinder, and hydraulic buffer system, excavator and concrete pump truck
CN102108990B (en) * 2010-07-23 2011-12-28 三一重工股份有限公司 Hydraulic cylinder and related devices thereof, hydraulic buffer system, excavator and concrete pump truck
EP2455620B1 (en) 2010-11-06 2014-05-07 FESTO AG & Co. KG Fluid operated linear motor with cushioning means
DE102012002162B4 (en) * 2012-01-31 2022-11-17 Magna Pt B.V. & Co. Kg Power train clutch assembly and fluid cylinder therefor
US20170008188A1 (en) * 2015-07-10 2017-01-12 Justin Staffen Cutting apparatus
JP6649024B2 (en) * 2015-09-30 2020-02-19 住友精密工業株式会社 Hydraulic cylinder for aircraft landing gear
US11059499B2 (en) * 2016-01-27 2021-07-13 Ales Tech Srl Suspension system for levitation vehicles
JP7398411B2 (en) * 2021-07-08 2023-12-14 Ckd株式会社 Shaft braking device and arm-type assist device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556698A (en) * 1945-02-05 1951-06-12 G F Goodson Piston construction
DE947776C (en) * 1952-09-14 1956-08-23 Westinghouse Bremsen Ges M B H Pneumatic door lock cylinder
US3034482A (en) * 1960-02-29 1962-05-15 Harold K Rader Adjustable piston cushion
DE1750939A1 (en) * 1968-06-20 1971-05-13 Bosch Gmbh Robert Device for damping the movement of a piston in a cylinder
FR2412731A1 (en) * 1977-12-20 1979-07-20 Bradford Cylinders Ltd Hydraulic ram damper unit - comprises cylindrical seal on piston and annular face with leakage passage in cylinder
DE3818833A1 (en) * 1988-06-03 1989-02-02 Dimter Erwin Piston for pneumatic cylinders, especially cylinders without a piston rod
US4829881A (en) * 1987-03-12 1989-05-16 Ckd Corporation Rod-less cylinder

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1604548A (en) * 1923-12-15 1926-10-26 Nat Pneumatic Co Door engine
US1891312A (en) * 1932-01-21 1932-12-20 Perfection Steel Body Co Hydraulic hoist for dumping trucks
US3072104A (en) * 1960-03-30 1963-01-08 Westinghouse Brake & Signal Cylinder with piston cushioning feature
US3157095A (en) * 1962-04-12 1964-11-17 Elmer F Heiser Piston and cylinder device
US3440930A (en) 1966-07-18 1969-04-29 Westinghouse Air Brake Co Cushion seal device for power cylinders
BE793149A (en) 1971-12-27 1973-06-21 Westinghouse Bremsen Apparate LIMIT SWITCH CUSHIONING DEVICE
US3964370A (en) 1974-07-15 1976-06-22 Parker-Hannifin Corporation Cushioning means for hydraulic cylinder
FR2425008A1 (en) 1978-05-05 1979-11-30 Climax France Sa DEVICE FOR CONTROLLING THE DECELERATION AND / OR ACCELERATION OF A MOBILE ELEMENT FOLLOWING A BACK-AND-BACK RIGGED ALTERNATIVE MOVEMENT, IN THE NEARBY OF AT LEAST ONE OF THE MOBILE ELEMENT LIMIT DEAD POINTS
US4373427A (en) 1980-01-31 1983-02-15 Tol-O-Matic, Inc. Fluid pressure cylinder
SE8107724L (en) 1981-12-22 1983-06-23 Mecman Ab DEVICE FOR A Piston Rod Loss PRESSURE CYLINDER
US4852465A (en) 1985-12-18 1989-08-01 Tol-O-Matic, Inc. Carrier bracket for power cylinder
FR2613785B1 (en) * 1987-04-13 1990-11-23 Gratzmuller Claude DIFFERENTIAL HYDRAULIC CYLINDER, WITH DAMPING SYSTEM, FOR THE CONTROL OF ELECTRIC CIRCUIT BREAKERS
IT1217812B (en) 1988-06-08 1990-03-30 Univers S P A Seal for rodless pneumatic cylinder
IT1272731B (en) 1993-10-18 1997-06-26 Luciano Migliori LINEAR ACTUATOR WITH POSITION ADJUSTABLE PNEUMATIC SHOCK

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556698A (en) * 1945-02-05 1951-06-12 G F Goodson Piston construction
DE947776C (en) * 1952-09-14 1956-08-23 Westinghouse Bremsen Ges M B H Pneumatic door lock cylinder
US3034482A (en) * 1960-02-29 1962-05-15 Harold K Rader Adjustable piston cushion
DE1750939A1 (en) * 1968-06-20 1971-05-13 Bosch Gmbh Robert Device for damping the movement of a piston in a cylinder
FR2412731A1 (en) * 1977-12-20 1979-07-20 Bradford Cylinders Ltd Hydraulic ram damper unit - comprises cylindrical seal on piston and annular face with leakage passage in cylinder
US4829881A (en) * 1987-03-12 1989-05-16 Ckd Corporation Rod-less cylinder
DE3818833A1 (en) * 1988-06-03 1989-02-02 Dimter Erwin Piston for pneumatic cylinders, especially cylinders without a piston rod

Also Published As

Publication number Publication date
US6382074B1 (en) 2002-05-07
CA2302722C (en) 2005-05-24
ITMI990640A1 (en) 2000-09-29
IT1312235B1 (en) 2002-04-09
CA2302722A1 (en) 2000-09-29
EP1041293A2 (en) 2000-10-04

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